Divergence in Thermal Physiology Could Contribute to Vertical Segregation in Intertidal Ecotypes of Littorina saxatilis
Divergence in Thermal Physiology Could Contribute to Vertical Segregation in Intertidal Ecotypes of Littorina saxatilis
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热生理学的差异可能有助于潮间带生态型的垂直分离
DOI:
10.1086/716176
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发表时间:
2021
影响因子:
1.6
通讯作者:
Dwane C
中科院分区:
文献类型:
--
作者:
Dwane C
Thermal stress is a potentially important selective agent in intertidal marine habitats, but the role that thermal tolerance might play in local adaptation across shore height has been underexplored. Northwest Spain is home to two morphologically distinct ecotypes of the periwinkleLittorina saxatilis, separated by shore height and subject to substantial differences in thermal stress exposure. However, despite other biotic and abiotic drivers of ecotype segregation being well studied, their thermal tolerance has not been previously characterized. We investigated thermal tolerance across multiple life history stages by employing the thermal death time (TDT) approach to determine (i) whether the two ecotypes differ in thermal tolerance and (ii) how any differences vary with life history stage. Adults of the two ecotypes differed in their thermal tolerance in line with their shore position: the upper-shore ecotype, which experiences more extreme temperatures, exhibited greater endurance of thermal stress compared with the lower-shore ecotype. This difference was most pronounced at the highest temperatures tested. The proximate physiological basis for these differences is unknown but likely due to a multifarious interaction of traits affecting different parts of the TDT curve. Differences in tolerance between ecotypes were less pronounced in early life history stages but increased with ontogeny, suggesting partial divergence of this trait during development. Thermal tolerance could potentially play an important role in maintaining population divergence and genetic segregation between the two ecotypes, since the increased thermal sensitivity of the lower-shore ecotype may limit its dispersal onto the upper shore and so restrict gene flow.
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DOI:
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发表时间:
1970
期刊:
影响因子:
--
作者:
R. Newell
通讯作者:
R. Newell
DOI:
--
发表时间:
1967
期刊:
影响因子:
--
作者:
E. E. Sandison
通讯作者:
E. E. Sandison
影响因子:
2.5
作者:
H. Urban
通讯作者:
H. Urban
DOI:
--
发表时间:
1944
期刊:
--
影响因子:
--
作者:
R. B. Cowles;C. M. Bogert
通讯作者:
R. B. Cowles;C. M. Bogert
影响因子:
1.6
作者:
Armstrong, Eric J.;Tanner, Richelle L.;Stillman, Jonathon H.
通讯作者:
Stillman, Jonathon H.